It is a generally accepted standard that editors should attempt to follow, though it is best treated with
common sense, and
occasional exceptions may apply. Any substantive edit to this page should reflect
consensus. When in doubt, discuss first on the
talk page.

The lead section (also known as the lead or introduction) of a Wikipedia article is the
section before the
table of contents and the first
heading. The lead serves as an introduction to the article and a summary of its most important contents. It is not a news-style
lead or "lede" paragraph.

The average Wikipedia visit is a few minutes.[1] The lead is the first thing most people will read upon arriving at an article. It gives the basics in a nutshell and cultivates interest in reading on – though not by teasing the reader or hinting at what follows. It should be written in a clear, accessible style with a
neutral point of view.

The lead should stand on its own as a concise overview of the article's topic. It should identify the topic, establish context, explain why the topic is notable, and summarize the most important points, including any prominent controversies.[2] The notability of the article's subject is usually established in the first few sentences. As in the body of the article itself, the emphasis given to material in the lead should roughly
reflect its importance to the topic, according to
reliable, published sources. Apart from basic facts, significant information should not appear in the lead if it is not covered in the remainder of the article.

As a general
rule of thumb, a lead section should contain no more than four well-composed paragraphs and be carefully sourced as appropriate.

Elements of the lead

The lead section may contain optional elements presented in the following order: disambiguation links (dablinks/hatnotes), maintenance tags, infoboxes, foreign character warning boxes, images, navigational boxes (navigational templates), introductory text, and table of contents, moving to the heading of the first section.

Structure of lead section:

{{Hatnote}}
{{Copy edit}}
{{Infobox rocket|name=...}}
{{Contains special characters}}
[[File:TypicalRocket.gif|...|A typical rocket]] or {{Rocket Navigation}}
A '''rocket''' is a ...
<!--Unless suppressed or modified via special syntax, or the article has fewer than four section headings, the table of contents is automatically generated at this point.-->
==First section==

Disambiguation links should be the first elements of the page, before any maintenance tags, infobox, or image; if a reader has reached the wrong page, they will want to know that first. Text-only browsers and
screen readers present the page sequentially. A "for topics of the same name ..." disambiguation link is sometimes put at the beginning of an article to link to another article discussing another meaning of the article title. In such cases, the line should be italicized and indented using
hatnote templates. Do not make this initial link a section. See also
WP:Hatnote.

Maintenance tags should be below the disambiguation links. These tags inform the reader about the general quality of the article and should be presented to the user before the article itself.

Infoboxes contain summary information or an overview relating to the subject of the article, and therefore should be put before any text (though in actuality they will generally appear to the side of the text of the lead). The primary difference between an infobox and a navigational box is the presence of parameters: a navigational box is exactly the same in all articles of the same topic, while an infobox has different contents in each article.

Foreign character warning boxes alert readers that the article contains foreign characters which may not be supported by their platform. If required, the warning should be sufficiently near any text using the foreign characters that scrolling is not required to see the warning. This is generally after short infoboxes, but before long ones.

Images. As with all images, but particularly the lead, the image used should be relevant and technically well-produced. It is also common for the lead image to be representative because it provides a visual association for the topic, and allow readers to quickly assess if they have arrived at the right page. Image captions are part of the article text. If the article has disambiguation links (dablinks), then the introductory image should appear just before the introductory text. Otherwise a screen reader would first read the image's caption, which is part of the article's contents, then "jump" outside the article to read the dablink, and then return to the lead section, which is an illogical sequence.

Sidebars are a collection of links used in multiple related articles to facilitate navigation between those articles. Sidebars are sometimes placed in the lead, especially when no infobox is present. If an infobox is present, the navigation sidebar may be moved to either the top or bottom of any other section in the article.

All but the shortest articles should start with Introductory text (the "lead"), which establishes significance, includes mention of significant criticism or controversies, and make readers want to learn more. The lead has no heading; its length should be commensurate with that of the article, but is normally no more than four paragraphs. See alsoWikipedia:Writing better articles § Lead section.

The table of contents (ToC) automatically appears on pages with at least four headings. Avoid
floating the ToC if possible, as it breaks the standard look of pages. If you must use a floated TOC, put it below the lead section in the wiki markup for consistency. Users of
screen readers expect the table of contents to follow the introductory text; they will also miss any text placed between the TOC and the first heading.

Citations

The lead must conform to
verifiability,
biographies of living persons, and other policies. The verifiability policy advises that material that is challenged or likely to be challenged, and direct quotations, should be supported by an
inline citation. Any statements about living persons that are challenged or likely to be challenged must have an inline citation every time they are mentioned, including within the lead.

Because the lead will usually repeat information that is in the body, editors should balance the desire to avoid redundant citations in the lead with the desire to aid readers in locating sources for challengeable material. Leads are usually written at a greater level of generality than the body, and information in the lead section of non-controversial subjects is less likely to be challenged and less likely to require a source; there is not, however, an exception to citation requirements specific to leads. The necessity for citations in a lead should be determined on a case-by-case basis by editorial
consensus. Complex, current, or controversial subjects may require many citations; others, few or none. The presence of citations in the introduction is neither required in every article nor prohibited in any article.

Introductory text

Provide an accessible overview

The lead section should briefly summarize the most important points covered in an article in such a way that it can stand on its own as a concise version of the article. The reason for a topic's noteworthiness should be established, or at least introduced, in the lead (but not by using subjective "
peacock terms" such as "acclaimed" or "award-winning" or "hit"). It is even more important here than in the rest of the article that the text be accessible. Editors should avoid lengthy paragraphs and overly specific descriptions – greater detail is saved for the body of the article. Consideration should be given to creating interest in the article, but do not hint at startling facts without describing them.

In general, introduce useful abbreviations, but avoid difficult-to-understand
terminology and symbols. Mathematical equations and formulas should be avoided when they conflict with the goal of making the lead section accessible to as broad an audience as possible. Where uncommon terms are essential, they should be placed in context, linked and briefly defined. The subject should be placed in a context familiar to a normal reader. For example, it is better to describe the location of a town with reference to an area or larger place than with coordinates. Readers should not be dropped into the middle of the subject from the first word; they should be eased into it.

Relative emphasis

According to
the policy on due weight, emphasis given to material should reflect its relative importance to the subject, according to published
reliable sources. This is true for both the lead and the body of the article. If there is a difference in emphasis between the two, editors should seek to resolve the discrepancy. Significant information should not appear in the lead if it is not covered in the remainder of the article, although not everything in the lead must be repeated in the body of the text. Exceptions include specific facts such as quotations, examples, birth dates, taxonomic names, case numbers, and titles. This admonition should not be taken as a reason to exclude information from the lead, but rather to harmonize coverage in the lead with material in the body of the article.

Opening paragraph

The first paragraph should
define or identify the topic with a
neutral point of view, but without being too specific. It should establish the context in which the topic is being considered by supplying the set of circumstances or facts that surround it. If appropriate, it should give the location and time. It should also establish the boundaries of the topic; for example, the lead for the article
List of environmental issues succinctly states that the list covers "harmful aspects of human activity on the biophysical environment".

The first sentence should tell the nonspecialist reader what, or who, the subject is. It should be in
plain English. Be wary of cluttering the first sentence with a long parenthesis containing alternative spellings, pronunciations, etc, which can make the sentence difficult to actually read; this information can be placed elsewhere.

Similarly, if the page is a
list, do not introduce the list as "This is a list of X" or "This list of Xs...". A clearer and more informative introduction to the list is better than verbatim repetition of the title. A good example of this is the
List of Benet Academy alumni. (See also
Format of the first sentence below).

When the page title is used as the subject of the first sentence, it may appear in a slightly different form, and it may include variations, including
synonyms.[4] Similarly, if the title has a
parenthetical disambiguator, such as
Egg (food), "(food)" should be omitted in the text.[5]

If its subject is definable, then the first sentence should give a concise definition: where possible, one that puts the article in context for the nonspecialist. Similarly, if the title is a
specialised term, provide the context as early as possible.[6]

Keep
redundancy to a minimum in the first sentence. Use the first sentence of the article to provide relevant information that is not already given by the title of the article. The title of the article need not appear verbatim in the lead.[7]

For topics
notable for only one reason, this reason should usually be given in the first sentence.[10]

Try to not overload the first sentence by describing everything notable about the subject. Instead use the first sentence to introduce the topic, and then spread the relevant information out over the entire lead.

While a commonly recognisable form of name will be used as the title of biographical articles, fuller forms of name may be used in the introduction to the lead. For instance, in the article
Paul McCartney, the text of the lead begins: "Sir James Paul McCartney ...".

Format of the first sentence

If an
article's title is a formal or widely accepted name for the subject, display it in bold as early as possible in the first sentence.

This is also done, at the first occurrence in running text, of a term (commonly a synonym in the lead) that is
redirected to the article or one of its subsections, whether the term appears in the lead or not:

If an article is about an event involving a subject about which there is no main article, especially if the article is the
target of a redirect, the subject should be in bold:

Azaria Chantel Loren Chamberlain (11 June 1980 – 17 August 1980) was an Australian baby girl who was killed by a dingo on the night of 17 August 1980... (
Death of Azaria Chamberlain, redirected from Azaria Chamberlain)

If the article's title does not lend itself to being used easily and naturally in the opening sentence, the wording should not be distorted in an effort to include it. Instead, simply describe the subject in normal English, avoiding redundancy.

Adhering to
Wikipedia:Article titles § Special characters, if the mention of the article's title is surrounded by quotation marks, the title should be bold but the quotation marks should not be, except if the quotation marks are part of the proper title of the article:

Foreign language

If the subject of the article is closely associated with a non-English language, a single foreign language equivalent name can be included in the lead sentence, usually in parentheses. For example, an article about a location in a non-English-speaking country will typically include the local language equivalent:

Pronunciation

If the name of the article has a pronunciation that is not apparent from its spelling, include its
pronunciation in parentheses after the first occurrence of the name. Most such terms are foreign words or phrases (mate,coup d'état), proper nouns (
Ralph Fiennes,
Tuolumne River,
Tao Te Ching), or very unusual English words (
synecdoche,
atlatl). Do not include pronunciations for names of foreign countries whose pronunciations are well known in English (
France,
Poland). Do not include them for common English words with pronunciations that are merely counterintuitive for learners (
laughter,
sword). If the name of the article is more than one word, include pronunciation only for the words that need it unless all are foreign (all of
Jean van Heijenoort but only Cholmondeley in
Thomas P. G. Cholmondeley). A fuller discussion of pronunciation can come later in the article.

Exactly what provides the context needed to understand a given topic varies greatly from topic to topic.

The Gemara is the component of the
Talmud comprising rabbinical analysis of and commentary on the
Mishnah.

Do not, however, add contextual links that don't relate directly to the topic's definition or reason for notability. For example,
Van Cliburn's opening sentence links to
Cold War because his fame came partly from his Tchaikovsky Competition victory being used as a Cold War symbol. The first sentence of a page about someone who rose to fame in the 1950s for reasons unrelated to the Cold War should not mention the Cold War at all, even though the Cold War is part of the broader historical context of that person's life. By the same token,
do not link to years unless the year has some special salience to the topic.

Links appearing ahead of the bolded term distract from the topic if not necessary to establish context, and should be omitted even if they might be appropriate elsewhere in the text. For example, a person's title or office, such as colonel, naturally appears ahead of their name, but the word "Colonel" should not have a link, since it doesn't establish context. Do not, however, reword a sentence awkwardly just to keep a needed contextual link from getting ahead of the bolded term.

Organisms

When a common (vernacular) name is used as the article title, the boldfaced common name is followed by the italic un-boldfaced scientific name in round parentheses in the opening sentence of the lead. Alternative names should be mentioned and reliably sourced in the text where applicable, with bold type in the lead if they are in wide use, or elsewhere in the article (with or without the bold type, per editorial discretion) if they are less used. It is not necessary to include non-English common names, unless they are also commonly used in English, e.g. regionally; if included, they should be italicized as non-English.

Thomson's gazelle (Eudorcas thomsonii) is the most common gazelle of
East Africa...

Scope of article

In some cases the definition of the article topic in the opening paragraph may be insufficient to fully constrain the scope of the article. In particular, it may be necessary to identify material that is not within scope. For instance, the article on
fever notes that an elevated core body temperature due to
hyperthermia is not within scope. These explanations may best be done at the end of the lead to avoid cluttering and confusing the first paragraph. This information and other meta material in the lead is not expected to appear in the body of the article.

Alternative names

The
article title appears at the top of a reader's browser window and as a large level 1 heading above the editable text of an article, circled here in dark red. The name or names given in the first sentence does not always match the article title. This page gives advice on the contents of the first sentence, not the article title.

By the design of Wikipedia's software, an article can have only one title. When this title is a name, significant alternative names for the topic should be mentioned in the article, usually in the first sentence or paragraph. These may include alternative spellings, longer or shorter forms, historical names, and significant names in other languages. Indeed, alternative names can be used in article text in contexts where they are more appropriate than the name used as the title of the article. For example, the city now called "
Gdańsk" can be referred to as "Danzig" in suitable historical contexts. The editor needs to balance the desire to maximize the information available to the reader with the need to maintain readability.

Non-English titles

Although Wikipedia's naming conventions
recommend the use of English, there are instances where the subject of an article is best known in English-language sources by its non-English name. In this case, the non-English title may be appropriate for the article.

Relevant foreign-language names, such as in an article on a person who does not themselves write their name in English, are encouraged. Separate languages should be divided by
semicolons, and
romanizations of non-Latin scripts by
commas.

Biographical

The basic instructions for biographical names are summarized below;
the main guideline on this provides additional detail.

The name of a person is presented in full if known, including any given names that were abbreviated or omitted in the article's title. For example, the article on
Calvin Coolidge gives his name as John Calvin Coolidge Jr.

If a
hypocorism (diminutive) that is common in English is often used for the subject in lieu of a given name, it is not inserted into the name or given after it. E.g.,
Tom Hopper has simply Thomas Edward Hopper.

Also acceptable are formulations like Alessandro di Mariano di Vanni Filipepi, known as Sandro Botticelli, when applicable. Hypocorisms are not put in quotation marks.

If a person is commonly known by a
nickname (other than a hypocorism), it is presented between quote marks following the last given name or initial, as for
Bunny Berigan, which has Roland Bernard "Bunny" Berigan. The quotation marks are not boldfaced.

Separate section usage

If there are three or more alternative names, or if there is something notable about the names themselves, they may be moved to and discussed in a separate section with a title such as "Names" or "Etymology". Once such a section or paragraph is created, the alternative English or foreign names should not be moved back to the first line. As an exception, a local official name different from a widely accepted English name should be retained in the lead.

Stubs

Where the article is a
stub and has no section headings, a lead may not be necessary. Although Wikipedia encourages expanding stubs, this may be impossible if reliably sourced information is not available. Once an article has been sufficiently expanded, generally to around 400 or 500 words, editors should consider introducing section headings and removing the stub classification.

Length

The appropriate length of the lead section depends on the total
length of the article. As a general guideline—but not absolute rule—the lead should usually be no longer than four paragraphs. The length of the lead should conform to readers' expectations of a short, but useful and complete, summary of the topic. A lead that is too short leaves the reader unsatisfied; a lead that is too long is intimidating, difficult to read, and may cause the reader to lose interest halfway. The following suggestions about lead length may be useful ("article length" refers to
readable prose size):

Article length

Lead length

Fewer than 15,000 characters

One or two paragraphs

15,000–30,000 characters

Two or three paragraphs

More than 30,000 characters

Three or four paragraphs

Lead sections that reflect or expand on sections in other articles are discussed at
Summary style. Journalistic conventions for lead sections are discussed at
News style.

Editing the lead section

All users can edit the lead by clicking the edit link of the whole article. By default, there is no edit link just for the lead section, but registered users can get it by enabling one or both of the following
preferences (both require JavaScript):

Comparison to the news-style lead

Wikipedia leads are not written in
news style. Although there are some similarities, such as putting the most important information first and making it possible for any reader to understand the subject even if they only read the lead, there are some important differences. The
lead paragraph (sometimes spelled "
lede")[16] of newspaper journalism is a very compressed summary of only the most important facts about a story. These basic facts are sometimes referred to as the "
five Ws": who, what, when, where, and why. Journalistic leads normally are only one or two sentences long. By contrast, in Wikipedia articles, the first sentence is usually more similar to a definition, the lead is longer, and it ultimately provides far more information, as its purpose is to summarize the article, not just introduce it.

Comparison of journalistic and encyclopedic leads

Journalistic lead

Encyclopedic lead

"Toxic gas leaking from an American-owned insecticide plant in central India killed at least 410 people overnight, many as they slept, officials said today. At least 12,000 were reported injured in the disaster in the city of Bhopal, 2,000 of whom were hospitalized." Hazarika, Sanjoy (3 December 1984)
"Gas leak in city kills at least 410 in city of Bhopal"The New York Times

The Bhopal disaster, also referred to as the Bhopal gas tragedy, was a
gas leak incident in India, considered
the world's worstindustrial disaster. It occurred on the night of 2–3 December 1984 at the
Union Carbide India Limited (UCIL)
pesticide plant in
Bhopal, Madhya Pradesh. Over 500,000 people were exposed to
methyl isocyanate (MIC) gas and other chemicals. The toxic substance made its way in and around the
shanty towns located near the plant. Estimates vary on the death toll. The official immediate death toll was 2,259. The
government of Madhya Pradesh confirmed a total of 3,787 deaths related to the gas release. Others estimate 8,000 died within two weeks and another 8,000 or more have since died from gas-related diseases. A government affidavit in 2006 stated the leak caused 558,125 injuries including 38,478 temporary partial injuries and approximately 3,900 severely and permanently disabling injuries.

No teasers

Tabloid, magazine, and broadcast news leads may have "teasers" that intentionally omit some crucial details to entice readers to read or watch the full story. They may even "
bury the lead" by hiding the most important facts. This style should never be used on Wikipedia.

Remember that the title need not always appear in the lead if the article title is descriptive, and in any case the statement relations are relations does not help a reader who does not know the meaning of diplomatic relations. In this case, the editor of the second version sensibly opted to include new information (that relations were established in 1947) in the first sentence, rather than repeating the title.

Sometimes a little redundancy is unavoidable. The Oxford English Dictionary has to be called by its proper name in its article, and cannot be called anything other than a dictionary in the first sentence. Even in these cases, the first sentence must provide information not given in the title. But try to rephrase whenever possible. Instead of:

The Oxford English Dictionary [...] is a comprehensive dictionary of the English language.
[3]

consider:

The Oxford English Dictionary [...] is the premier dictionary of the English language.
[4]

Both contain some redundancy, but the second is better because it tells us that the OED is the world's most respected dictionary of English. Again, someone who knows what the word dictionary means will probably assume that any dictionary is comprehensive, so they do not need to be told that.

This example not only tells the reader that the subject was a mathematician, it also indicates her field of expertise and work she did outside of it. The years of her birth and death provide time context. The reader who goes no further in this article already knows when she lived, what work she did, and why she is notable. (
Wikipedia:Manual of Style/Biographies has more on the specific format for biography articles.)

^"Usually" here can account for cases like "Foo, also known as Bar, Baz, or Quux", where the "Baz" item is actually not a redirect from "Baz", but maybe "Baz (chemistry)", and so it wouldn't fit an absolute redirect requirement, but would be visually confusing if de-boldfaced between the other two. "Usually" isn't blanket license to
boldface things for emphasis.

^Many, but not all, articles repeat the article title in bold face in the first line of the article. Linking the article to itself produces boldface text; this practice is discouraged as page moves will result in a useless circular link through a redirect. Linking part of the bolded text is also discouraged because it changes the visual effect of bolding; some readers will miss the visual cue which is the purpose of using bold face in the first place.

^Disambiguation pages are navigational aides rather than articles and where there is a primary topic for a term, the introductory line for that term's disambiguation page does typically have that term both linked and bolded; see
MOS:DABPRIMARY